This kind of Resistance-reduce-agent is composed of many ingredients, including electrolyte, curing agent, lubricant, electro-conductive cement and stuffing materials. As one excellent electric conductor, it is used between grounding part and earth. On the one hand, it can be closely connected to metal grounding to form enough current surface; on the other hand, it can infiltrate into soil near it to lower resistance and form one low resistance district around grounding parts.
13.Surge Restrain Anti-thunder Cabinet for Power Distribution Network
QSD series surge restrain protection device adopts the most advanced surge identification technique and latest machining craftwork in world at present, which is applicable for the communication computer office, the power equipment of communications station and the power equipment of military affairs chain of command and other main equipments.
Specs & Type
QSD125A-2S
QSD125A-4S
QSD125-2S
QSD125-4S
QSD125Y-2S
QSD125Y-4S
Order No.
5400
5410
5402
5403
5404
5405
Uo(V)
220
220
220
220
220
220
Uc(V)
275
275
275
275
440
440
ln(KA)
25
25
25
25
25
25
lmax(KA)
50
50
50
50
50
50
Up(KV)
1.4
1.4
1.4
1.4
1.0
1.0
lie(μA)
＜5
＜5
＜5
＜5
＜0.5
＜0.5
Answering Time
＜5ns
Working Environment
-40℃-80℃
Relative Humidity
≤95％
Installation Condition
Earthing Resistance ＜ 10 Ω
External Dimension
100×300×400(mm)
Connecting Lead Specs
≥6mm
Application
Single-phase Power Supply
Three-phase Power Supply
Single-phase Power Supply
Three-phase Power Supply
Single-phase Power Supply
Three-phase Power Supply
Scope of Application
two, three grade protection for main power equipment
two, three grade protection for main power equipment in region with heavy thunderstorm
Equipment
Lighting Alarm
Counter
Audible and Visual Alarm
Signal Connecting Interface
Surge Distinguish
Counter
Audible and Visual Alarm
Signal Connecting Interface
Specs & Type
QSD150A-2S
QSD150A-4S
QSD150-2S
QSD150-4S
QSD150Y-2S
QSD150Y-4S
Order No.
5420
5421
5422
5423
5424
5425
Uo(V)
220
220
220
220
220
220
Uc(V)
275
275
275
275
440
440
ln(KA)
50
50
50
50
50
50
lmax(KA)
100
100
100
100
100
100
Up(KV)
1.5
1.5
1.5
1.5
1.5
1.5
lie(μA)
＜5
＜5
＜5
＜5
＜0.5
＜0.5
Answering Time
＜5ns
Working Environment
-40℃-80℃
Relative Humidity
≤95％
Installation Condition
Earthing Resistance ＜ 10 Ω
External Dimension
100×300×400(mm)
Connecting Lead Specs
≥6mm
Application
Single-phase Power Supply
Three-phase Power Supply
Single-phase Power Supply
Three-phase Power Supply
Single-phase Power Supply
Three-phase Power Supply
Scope of Application
one, two grade protection for main power equipment
one, two grade protection for main power equipment in region with heavy thunderstorm
Equipment
Lighting Alarm
Counter
Audible and Visual Alarm Signal Connecting Interface
Surge Distinguish
Counter
Audible and Visual Alarm
Signal Connecting Interface
